Means for smoothing and ironing the insulating-wrapping of electric conductors.



A. FINCKBEIN.

MEANS FOR SMOOTHING AND momma THE INSULATING WRAP-PING 0F ELECIRIC CONDUCIORS.

APPLICATION FILED MILG, I913.

Patented Oct. 5, 1915;

2 SHEETS-SHEET I A. FINCKBEIN.

MEANS FOR SMOOTHING AND IRONING THE INSULATING WRAPPING 0F ELECTRIC CONDUCTORS.

APPLICATION FILED JAN-51I9I3- 1,1 55,345. Patented Oct-1 5,1915.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

ADOLF FINGKBEIN, 0F CHARLOTTENBURG, GERMANY, ASSIGNOR T0 SIEMENS- SCHUCKERTWERKE G. M. B. H., A CORPORATION GERMANY.

MEANS FOR SMOOTHING- AND IRONING THE INSULATING-WRAPPING OF ELECTRIC. CONDUCTORS.

Application filed Januarv 6. 1913.

tion of electric conductors and spools, when these have been wrapped with insulating.

material which is bound together by means of a fusible binder. The bundle of conductors which have been wrapped around must in that case be pressed together while warm and the wrapping must be firmly com pressed so that the air inclosed within the material can as far as possible completely escape and the whole become a compact mass-of metal and insulating material.

- With this object in view the conductors or spools which have been wrapped are, ac-

cording to my invention, laid longitudinally in between plates oflering adequate resistance to pressure, such plates abutting against two sides of the wrapping, and are smoothed over on the two remaining sides by means of pressure plates, rollers or bands, whereby the insulation wl ic'h has been wrapped on becomes firmly pressed down.

Owing to the wrapped conductors or spools being laid in between firmly resisting plates, distortion of the conductors .when the insulated covering is being firmly pressed together is effectively prevented, and no damage to the insulation when smoothing it out and ironing it can occur.

In hitherto known devices the conductors or spools have been gripped at two places and the insulation between these two places has been firmly pressed by means of ironers or pressure plates: the motion of these ironers or plates is so arranged that the wrapping becomes firmly mpressed down. That portion of the wrapping which lies between the clamping places is by this process liable to be bent out of shape, ruptured or otherwise damaged, whereby the insulation of the bundle of conductors very readily depreciates.

One ob]ect of my invention is to avoid these defects, and to this end I arrange that Specification of Letters Patent.

Patented Oct. 5, 1915.

Serial No. 740,458.

the bundle of conductors to be insulated is protected throughout its entire length against being distorted owing to the use of firmly constructed plates and so grasped and retained between the plates that only that portion of the wrapping remains free which comes under the ironing roller or plate or is in the immediate vicinity of the same. The bundle of conductors may consist of either closed spools or of the various sides of spools or of rods.

The new device may also be constructed in such a manner that the plates and rollers have stationary supports and that a flexible band passes between them and the insulation to be operated on, this band being pressed with the requisite pressure by the plates .or rollers and so producing the desired effect. The band may consist of metal or other material and may be employed in one or more endless loops. To facilitate the closed spools being readily inserted and withdrawn,joint-fasteners are arranged at one or more places in the band so that the loop can be readily opened and closed.

The pressure which the plates or rollers exert on the band may be easily regulated by known means, e. g. by the adjustment of pressure springs, by variations in the water-pressure or gas-pressure acting on a piston, and so forth. Moreover instead of plates or rollers other pressure means may be applied by means of a number of balls located close together either on a rectilinear plane or on a curved surface.

My invention will be more fully understood by reference to the accompanying drawings of which Figure 1 shows a cross-section through an arrangement whereby the conductors are held in position by holding plates which are interposed between a series of rollers and pressure plates one of said series being arranged above and the other below said holding plates, F if. 2 shows somewhat diagrammatically how the aforementioned pressure plates and rollers are moved over the conductors and their holding plates, Fig. 3 shows a. modified construction for moving the pressure plates and rollers, Fig. 4 an arrangement wherein pairs of plates and of rollers are arranged alternately, Fig. 5 a construction wherein only rollers are em be employed; for example, pressure could ployed as pressure members, Fig. 6 an arrangement whereby the holding plates of the conductors are moved between two belts whieh are applied'under pressure on either side of said holding plates and said cone ductors and F ig..,.7 an arrangement similar to that ofFig. 2 wherein the holding pla'tes and the 'interposedconductors are kept at rest, the ironing effect on either side-of said plates and conductors 'beingefiectedby an endless band which is applied under pressure upon the insulation of the conductors.

In Fig. 1 b is a bundle of'electrical conductors the insulating wrapper which has .been woundaround the conductors. The con- 'ductors are held at the'narrow sides of their .cross-section by two smooth plates 7) p,.while over both the wider sides of this cross-section one or more plates 6 and rollers w give a stroking or soothing action in such a direction that they smooth out the insulating material firmly around the bundle of conductors b.

The motion of the plates and rollers is preferably so regulated that while a roller .exerts its stroking action over one surface of the cross-section, the other surface is covered by a plate, and in that way the material under 'the roller becomes uniformly and firmly pressed and smoothed out. 4 This effect can be brought about by giving to the plates a width at least double that of the spools.

For producing the proper motion of the plates and rolls in opposite directions on difierent sides-of the'wrapped conductor in the drawings, an endless belt or chain device is showmsee Figs. 6 and 7. It is understood,-

however, that any equivalent device may be substituted therefor which produces the aforesaid motion between plates and rollers and the-surfaces on opposite sides of the wrapped conductor.

In the constructionof Fig. 2 the various plates and rollers maybe arranged in order toobtain such a closed chain, which exerts astroking action bothon the upper and on the lower sides-of the spools.

In Fig. 3 a'form of track is employed for the chain, there being here one chain for v applying to the upper side and one to the lower side. In place of the rollers w smooth plates may be employed. It is essential only that they smooth'out the insulating material 55 in the manner above described. The rollers or plates maybe heated-in any desired manner in order in each particular case to raise the binder of theinsulating material to the melting point. 1

Further examples of apparatus according to my inventionare illustrated in Figs. 4 to 7." Here 1) indicate the smooth pressure.-

resisting plates, which hold the conductors 7) to .be insulated and hold them moreover throughout their entire length; the insulating coatin is designated by fz is amend less .band whic is drawn through between the coating. of insulation to be-smoothed out and tion of the arrows so that the direction of the pressure members, e. g. the plates 6 and the rollers w. The band 2 moves in the. diree fm motion. is opposite on both sides .of the bundle of wires or the spool 72. The direc .tion of pressure o f the-plates e androllers ,w is likewise'indicated by arrows. i

The plates and rollers as shown in Fig. 4

press on those portions of the draw-band 2 which lie upon the insulating coating to be rendered smooth.

, Therollers as shown 5 are arranged away from those sides of the spools which are operated upon, and they pressthe band directly onto the plates p serving as the gripping" device. Owing to the tensile stress of the band a, the latter will exert, pressure on the insulatingco'a'ting and in asomewhat gentler manner than is the casein Fig. 4.

In Fig. 6 the insulated conductors b are placed in between the plates 2 at'the righthand side of the figure and carried by hand or any proper mechanism in the directionof the arrowsshown laterally thereof, so that they will be ironed by the belts a which travel in opposite direction over the upper.

and under face of the insulation. The conductors are then removed a/t the left-hand side from the retaining devlce. In this ar rangement two endlessflbauds (i. e. bands closed on themselves) are employed.

In'Fig. 7 the band is guided in the form ot a single endless loop. Pressure is transabutment plates adapted to abut longitudi nally against a conductor to'hold the same in position and so as to expose said wrap-' ping on two opposite sides, and means for V ironing saidtwo opposite sides'ofsaid wrapping, whereby thesame will be compressed and drawn tight, substantiall as described." 2. An apparatus for-'smoot ing and ironing the insulating wrapping 0'11 electrical conductors of thekind specified, comprise ing rigidiabutment plates adapted to abut longitudinally against aconductor so as to r expose two: opposite sides of said wrapping; and pressure means for "ironing said wra ping on a side thus exposed, whereby e same will be compressed and 'drawn" tight,

substantially as described.

3. An apparatus for smoothing and ironing the insulating wrappin conductors oi the I p on electrical p i z rigid abutment plates adapted to abut longitudinally against a conductor so as to expose two opposite sides of said wrapping, pressure members abutting against both of said exposed sides of said wrapping, means for producing relative movement between said pressure members and said wrapping, saidmovement being transverse to the conductors and the movement of said pressure members I two opposite sides of said wrapping, pressure members, abutting against both of said exposed sides of said wrapping, andimeans for producing movement of said pressure members on one of said exposed sides oppositely to those on the other side, whereby an ironing efiect will be exerted upon said wrapping and the same compressed and drawn tight, substantially'as described.

\ 5. An apparatus for smoothing and ironing the insulating wrapping on electrical conductors of the kind specified, comprising rigid abutment plates adapted to abut against the entire length of a conductor on two opposite sides of its wrapping, pressure plates and pressure rollers abutting against the two remaining sides of said wrapping, said pressure plates and rollers being adapted to move in opposite direction on said two sides of the wrapping, and means for producing relative movement between said pressure plates and rollers and said sides of-said wrapping against which they respectively abut, said movement being transverse to the conductors, the movement of said pressure plates and rollers being in opposite directions on opposite sides of said wrapping,

whereby an ironing effect will be exerted upon said wrapping for compressing and drawing same tight.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

ADOLF FIN CKBEIN. lvVitnesses:

Hnxmz HASPER, Wommmn Ham. 

